Well a known fact is that they had did an experiment didn't turn out great and no it didn't grow back unfortunately
Lung cancer, respitory problems, digestive problems, and other cancers.
Obesity is when someone has a condition of being grossly fat or overweight.
Benetton with an accident is where you get injured
That is something that cant be explained you will have to go to a doctor or a medical person or physician for that .
or try avoid using a cold shower take a hot shower